${(t)…}: Type of parameter

t evaluates to a string describing the type of the parameter. Additional properties are separated by -.

The first keyword describes the type:

• scalar
• array
• integer
• float
• association

The following keywords describe additional properties of the parameter. Please refer to the manual for a complete list of possible values.

Links

• Zsh manual on parameter expansion flags

Examples

Print types of parameters

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string=value declare -i int=42 declare -F float_value=42.0 declare -Argxu many=([10]=ten [42]="fourty two") echo ${(t)int} echo ${(t)float_value} echo ${(t)many}

Output:

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integer float association-upper-readonly-export